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� ' University of Minnesota Pump Selection Procedure <br /> All boxed rectangles must be entered,the rest will be calculated. <br /> ONs�re <br /> Sew�oe <br /> 1. Determine pump capacity: TRE�TME►�-r <br /> A. Gravity Distribution PROORAM ��- <br /> 1. Minimum required discharge is 10 gpm <br /> 2. Maximum suggested discharge is 45 gpm <br /> For other establishments at least 10%greater than the water <br /> supply rate, but no faster than the rate at which effluent will flow <br /> out of the distribution device. <br /> B. Pressure Distribution-see pressure design worksheet Soii r�eat-�e�r sys�eR, <br /> &point of discharge <br /> c� _ <br /> Selected Pump Capacity: 45 gpm total pipe 1 <br /> le�g'h � <br /> ,�„� 2A.e'�evc'ion <br /> 2. Determine Total Dynamic Head(TDH) �plpe `, difference <br /> A. Elevation difference between pump and point of discharge. ��, E': <br /> 15 feet ;! : •'------------------------- ----- <br /> �- -u-•--��� -.._.�.�. <br /> g. Special head requirement?(See Figure-Special Head Requirements) <br /> �feet Special Head Requirements <br /> Gravity Distribution Oft <br /> C. Friction loss in supply pipe Pressure Distribution 5ft <br /> 1. Select pipe diameter ��in <br /> 2. Enter Figure E-9 with gpm(1A or B)and pipe diameter(C1) <br /> Read friction loss in feet er 100 feet from Figure E-9 E•9 Friction Loss in Plastic Pipe <br /> Friction loss= 3.28 ft/100 ft of pipe per 100 ft <br /> nominal <br /> 3. Determine total pipe length from pump discharge to soil system discharge point. Flow Rate ipe diameter <br /> Estimate by adding 25 percent to pipe length for friction loss in fittings. pm 1.5" 2.0" 3" <br /> Pi e len th times 1.25=equivalent pipe length 20 2.47 0.73 0.11 <br /> 157 ft x 1.25= 196.25 feet 25 3.73 1.11 0.16 <br /> 30 5.23 1.55 0.23 <br /> 4. Calculate total friction loss by multiplying friction loss(C2) 35 6.96 2.06 0.3 <br /> by the equivalent pipe length(C3)and divide by 100. 40 8.91 2.64 0.39 <br /> Friction Loss= 3.28 ft/100ft X 196.25 ft I 100= 6.4 feet 45 11.07 3.28 0.48 <br /> 50 13.46 3.99 0.58 <br /> D. Total head requirement is the sum of elevation difference(A),special 55 4.76 0.7 <br /> heatl requirements(B),and total friction loss(C4). 60 5.6 0.82 <br /> 15 ft + 5 ft + 6.4 ft 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> Total Head: 26.4 feet <br /> 3. Pump Selection <br /> 1.A pump must be selected to deliver at least 45 gpm(1A or B) <br /> with at least 26.4 feet of total head(2D). <br /> I hereby certify t t I h completed this work in accordance with all applicable ordinances, rules and laws. <br /> (signature) �j'li� (license#) /0-z510 (date) <br /> Page 1 of 1 <br />